I made a camera holder last night with some scrap wood. I cut a 4x6" piece of deck board which will be screwed to the tree. Cut a 45 angle and screwed it to the board which the first non-movable arm is attached. That arm is 12" . To that arm I attached a 10" arm with a machine screw and nut so that it can swing side to side. These arms are ripped 2x4' s. ( 1 3/4" x1 3/4" ) At the end of the movabe arm I reemed out a hole for a 3/4" piece of PVC. This piece is only about 4" long and is on top of the arm facing up. I took the top of my tri-pod off. This is the part that allows your camera to swivel and tilt up and down. I placed it on to the PVC, snugged it down a little and there you go. Its a little rough, but its free and it' ll work. Heres a rough drawing. I' m thinking about making the next one out of square tubing instead of wood.